Salix uva-ursi |
Salix ×pendulina |
|
---|---|---|
bearberry willow |
weeping willow, Wisconsin weeping willow |
|
Habit | Plants 0.01–0.05 m, (dwarf), forming clonal compact mats by layering. | |
Stems | prostrate, short-trailing; branches red-brown, gray-brown, or yellow-brown, glabrous; branchlets yellow-green or yellow-brown, glabrous or puberulent. |
|
Leaves | stipules (sometimes marcescent) absent, rudimentary, or foliaceous on early ones, foliaceous on late ones; petiole (shallowly to deeply grooved adaxially), 2–6.5 mm; largest medial blade (marcescent), amphistomatous or hypostomatous, ovate, broadly obovate, oblanceolate, or elliptic, 4–23 × 3.5–10 mm, 1.7–3.6 times as long as wide, base convex or cuneate, margins flat, serrulate or crenulate, apex convex, acuminate, acute, or retuse, abaxial surface glaucous, usually glabrous (rarely few hairs), adaxial slightly or highly glossy, usually glabrous (rarely a few hairs); proximal blade margins entire or serrate; juvenile blade glabrous, pilose, or puberulent abaxially. |
|
Staminate flowers | abaxial nectary absent, adaxial nectary narrowly oblong or oblong, 0.4–0.9 mm; filaments distinct, glabrous; stamens usually 1, rarely 2; anthers ellipsoid or shortly cylindrical, 0.4–0.7 mm. |
|
Pistillate flowers | abaxial nectary absent, adaxial nectary narrowly oblong or oblong, 0.5–0.8 mm, shorter to longer than stipe; stipe 0.3–1.6 mm; ovary ovoid or pyriform, glabrous, beak gradually tapering to styles; ovules 4–9 per ovary; styles 0.4–1 mm; stigmas flat, abaxially non-papillate with rounded tip, or slenderly cylindrical, 0.1–0.23–0.4 mm. |
|
Capsules | 3–5 mm. |
|
Catkins | staminate 9–19 × 5–8 mm, flowering branchlet 0.5–9 mm; pistillate densely flowered, slender to subglobose, 11–47(–55 in fruit) × 6–10 mm, flowering branchlet 2–10 mm; floral bract brown, black, tawny, light rose, or bicolor, 1.1–1.8 mm, apex rounded or acute, entire, abaxially sparsely hairy, hairs straight or wavy. |
|
Salix | ×pendulina Wenderoth: Weeping willow, S. babylonica × S. euxina, is introduced from Europe and grown throughout the world. |
|
It | is characterized by: trees, 2.5–12 m, stems pendulous; branches highly brittle at base, yellow-brown, gray-brown, or red-brown; branchlets yellowish to brownish; stipules foliaceous on late leaves; petioles glabrous, pilose, or velvety to glabrescent adaxially; largest medial blade amphistomatous or hypostomatous, very narrowly elliptic to lanceolate, or linear, margins serrulate, irregularly so, or spinulose-serrulate, abaxial surface glaucous, adaxial slightly glossy or dull; catkins on distinct flowering branchlet, 3–14 mm; staminate loosely flowered, stout, 16–34 × 7–11 mm; pistillate densely or moderately densely flowered, slender or stout, 20–36 × 3.5–11 mm; pistillate bract persistent after flowering; staminate abaxial and adaxial nectaries connate and shallowly cup-shaped; stamens 2; anthers 0.5–0.6 mm; pistillate nectary longer than stipe; stipe 0 mm; styles 0.2–0.6 mm; ovules 4–8 per ovary; capsules 1.8–3.5 mm. |
|
2n | = 38. |
|
Salix uva-ursi |
Salix ×pendulina |
|
Phenology | Flowering mid Jun-early Aug. | |
Habitat | Exposed, often dry or moist, calcareous, serpentine, dioritic, and granitic rocks, boulders, gravel, sand on beaches, outcrops, in snowbeds | |
Elevation | 10-1200 m (0-3900 ft) | |
Distribution |
ME; NH; NY; VT; NL; NS; NU; QC; SPM; Greenland
|
CA; CT; DC; GA; IL; IN; MA; MD; ME; MI; MO; NC; NE; NJ; NM; NY; OH; OR; PA; TX; VA; WA; WV; ON [Introduced in North America] |
Discussion | Hybrids: Salix uva-ursi forms natural hybrids with S. herbacea. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Reports of this hybrid in British Columbia and California are undocumented. Plants of Salix ×pendulina with prominent, caudate stipules are var. blanda (Andersson) Meikle; those with ovaries with patchy or streaky hairiness are var. elegantissima (K. Koch) Meikle. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 73. | FNA vol. 7, p. 41. |
Parent taxa | Salicaceae > Salix > subg. Chamaetia > sect. Myrtosalix | Salicaceae > Salix > subg. Salix > sect. Subalbae |
Sibling taxa | ||
Synonyms | S. ivigtutiana, S. myrsinites var. parvifolia | |
Name authority | Pursh: Fl. Amer. Sept. 2: 610. (1813) | Wenderoth |
Web links |
|